CN220985424U - Front end cover assembly for explosion-proof motor - Google Patents
Front end cover assembly for explosion-proof motor Download PDFInfo
- Publication number
- CN220985424U CN220985424U CN202322589858.3U CN202322589858U CN220985424U CN 220985424 U CN220985424 U CN 220985424U CN 202322589858 U CN202322589858 U CN 202322589858U CN 220985424 U CN220985424 U CN 220985424U
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- China
- Prior art keywords
- end cover
- rotating shaft
- explosion
- mounting groove
- sleeve
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000007789 sealing Methods 0.000 claims abstract description 13
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 229910001369 Brass Inorganic materials 0.000 claims description 4
- 239000010951 brass Substances 0.000 claims description 4
- 239000004519 grease Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000017525 heat dissipation Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 description 7
- 239000000428 dust Substances 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 239000012459 cleaning agent Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 210000002268 wool Anatomy 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Motor Or Generator Frames (AREA)
Abstract
The utility model relates to the technical field of explosion-proof motors, in particular to a front end cover assembly for an explosion-proof motor, which comprises a front end cover and a rotating shaft, wherein a through groove for the rotating shaft to penetrate is formed in the axis position of the front end cover, and the through groove comprises a bearing mounting groove, a shaft sleeve mounting groove and a clamp spring ring groove from inside to outside; the ball bearing is arranged in the bearing mounting groove, the shaft sleeve is arranged in the shaft sleeve mounting groove, the snap spring is embedded in the snap spring ring groove, and the snap spring limits the outer end face of the shaft sleeve; the rotating shaft comprises a rotating shaft supporting section, and the rotating shaft supporting section is sleeved with the inner ring of the ball bearing and movably sleeved with the shaft sleeve. The assembly omits a sealing element with shorter service life, is easier to disassemble in structure and convenient to maintain, and can greatly save cost; in addition, the original modularized rotating shaft and front end cover assembly structure can effectively approximate the temperature rise of the shaft extension end, is beneficial to heat dissipation, and further prolongs the service life of the explosion-proof motor.
Description
Technical Field
The utility model relates to the technical field of explosion-proof motors, in particular to a front end cover assembly for an explosion-proof motor.
Background
The device is used for underground equipment in the coal mine industry, and because the working environment is that inflammable gas such as gas and large-particle inflammable dust such as coal dust coexist, the device is safe and the electrical equipment is not allowed to generate sparks during operation.
At present, most of explosion-proof motors used in coal mines are cast integrally, and in order to prevent dust from entering the motor, the motor front end cover is provided with framework oil seals, wool felt and other sealing elements. The skeleton oil seal has the problems of short service life, abrasion of the journal and the need of replacing the used sealing elements during motor maintenance. Because the environment is bad under the mine, external dust enters the rotary joint surface of the motor rotating shaft and the front end cover, dust accumulation is caused, and the motor runs for a long time, so that the abrasion failure of the rotary joint surface can be caused. Therefore, for the reasons mentioned above, the existing mining explosion-proof motor is provided with a maintenance period for use safety.
In the maintenance process, the front end cover and the machine body are integrally formed, or the stator is subjected to a glue filling process, so that the front end cover cannot be disassembled, and particularly after the motor runs for a long time, the abrasion phenomenon of the rotary joint surface is judged, and the whole stator is required to be replaced, so that the cost brought by replacing one end cover is greatly exceeded.
Therefore, a new solution is needed to solve the above technical problems.
Disclosure of utility model
The utility model aims to solve the problems of the prior art, and provides a front end cover assembly for an explosion-proof motor, which aims to solve the technical problems that in the prior art, a front end cover and a machine body, a rotating shaft and the front end cover are not easy to detach and maintenance cannot be carried out on the inside of the motor due to the fact that the front end cover and the machine body are integrally formed for coping with severe environments.
The above purpose is realized by the following technical scheme:
A front end cover assembly for an explosion-proof motor comprises a front end cover and a rotating shaft, wherein a through groove for the rotating shaft to penetrate is formed in the axis position of the front end cover, and the through groove comprises a bearing mounting groove, a shaft sleeve mounting groove and a clamp spring ring groove from inside to outside; the ball bearing is arranged in the bearing mounting groove, the shaft sleeve is arranged in the shaft sleeve mounting groove, the snap spring is embedded in the snap spring ring groove, and the snap spring limits the outer end face of the shaft sleeve; the rotating shaft comprises a rotating shaft supporting section, and the rotating shaft supporting section is sleeved with the inner ring of the ball bearing and movably sleeved with the shaft sleeve.
Further, the bearing mounting groove, the shaft sleeve mounting groove and the snap ring groove are all circular, the inner diameter of the bearing mounting groove is set to be R1, the inner diameter of the shaft sleeve mounting groove is set to be R2, and the inner diameter of the snap ring groove is set to be R3, then:
R1＞R2，R3＞R2。
Further, the shaft sleeve mounting groove is T-shaped and comprises a first shaft sleeve mounting groove and a second shaft sleeve mounting groove which are communicated with each other; correspondingly, the shaft sleeve is T-shaped and comprises a sleeve and an annular flange, wherein the sleeve is connected with the annular flange, the annular flange is arranged at the outer end of the sleeve, and the rotating shaft is movably sleeved on the sleeve.
Further, a plurality of annular grooves are formed along the inner wall of the sleeve, and lubricating grease is filled in the annular grooves.
Further, the bottom surface of the annular flange is bonded with the bottom wall of the first shaft sleeve mounting groove through an adhesive.
Further, a plurality of dismounting holes are formed in the annular flange.
Further, the shaft sleeve is made of lead brass.
Further, the front end cover is made of metal.
Further, the rotating shaft sequentially comprises a rotating shaft extending section, a rotating shaft supporting section and a rotating shaft rear section from outside to inside, wherein the rotating shaft extending section is positioned on the outer side of the front end cover, the rotating shaft rear section is positioned on the inner side of the front end cover, and the rotating shaft supporting section is positioned in the through groove.
Further, an annular sealing bulge concentric with the through groove is also arranged along the inner side of the front end cover, and the annular sealing bulge is matched with a stator cavity of the explosion-proof motor; screw holes are further formed in the corners of the front end cover and used for screwing the front end cover and the ports of the stator cavity through screws.
Advantageous effects
Compared with the traditional front end cover which is sealed by framework oil seals, wool felts and other sealing elements, the front end cover assembly for the explosion-proof motor provided by the utility model omits the sealing elements with shorter service life, is easier to disassemble in structure, is more convenient to maintain and can greatly save cost; in addition, the original modularized rotating shaft and front end cover assembly structure can effectively approximate the temperature rise of the shaft extension end, is beneficial to heat dissipation, and further prolongs the service life of the explosion-proof motor.
Drawings
FIG. 1 is a perspective view of a front end cover assembly for an explosion-proof motor according to the present utility model;
FIG. 2 is a cross-sectional view of a front end cap assembly for an explosion-proof motor according to the present utility model;
FIG. 3 is an exploded view of a front end cover assembly for an explosion proof motor according to the present utility model;
Fig. 4 is a schematic structural view of a shaft sleeve in a front end cover assembly for an explosion-proof motor according to the present utility model;
FIG. 5 is a schematic structural view of a rotating shaft in a front end cover assembly for an explosion-proof motor according to the present utility model;
FIG. 6 is a cross-sectional view of a front end housing assembly for an explosion-proof motor according to the present utility model;
Fig. 7 is a schematic view of a first view angle structure of a front end cover in a front end cover assembly for an explosion-proof motor according to the present utility model;
Fig. 8 is a schematic diagram of a second view angle structure of a front end cover in the front end cover assembly for an explosion-proof motor according to the present utility model. The graphic indicia:
1-a front end cover;
2-rotating shaft, 201-rotating shaft extending section, 202-rotating shaft supporting section and 203-rotating shaft rear section;
3-through grooves, 301-bearing mounting grooves, 302-shaft sleeve mounting grooves, 303-snap spring ring grooves, 304-first shaft sleeve mounting grooves and 305-second shaft sleeve mounting grooves;
4-ball bearings;
5-sleeve, 501-sleeve, 502-annular flange, 503-annular groove, 504-disassembly hole;
6-clamping springs;
7-annular sealing projections;
8-screw holes.
Detailed Description
The utility model is described in further detail below with reference to the drawings and examples. The described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1 to 3, a front end cover assembly for an explosion-proof motor comprises a front end cover 1 and a rotating shaft 2, wherein a through groove 3 for the rotating shaft 2 to penetrate is formed in the axis position of the front end cover 1, and the through groove 3 comprises a bearing mounting groove 301, a shaft sleeve mounting groove 302 and a clamp spring ring groove 303 from inside to outside; the ball bearing 4 is arranged in the bearing mounting groove 301, the shaft sleeve 5 is arranged in the shaft sleeve mounting groove 302, the snap spring 6 is embedded in the snap spring ring groove 303, and the snap spring 6 limits the outer end face of the shaft sleeve 5; the rotating shaft 2 comprises a rotating shaft supporting section 202, and the rotating shaft supporting section 202 is sleeved with the inner ring of the ball bearing 4 and is movably sleeved with the shaft sleeve 5.
Wherein, the bearing mounting groove 301, the sleeve mounting groove 302 and the snap ring groove 303 are all circular, and if the inner diameter of the bearing mounting groove 301 is set to R1, the inner diameter of the sleeve mounting groove 302 is set to R2, and the inner diameter of the snap ring groove 303 is set to R3, then there are:
R1＞R2，R3＞R2。
As shown in fig. 4 and 6, the sleeve mounting groove 302 is T-shaped and includes a first sleeve mounting groove 304 and a second sleeve mounting groove 305 that are mutually communicated, wherein the first sleeve mounting groove 304 and the second sleeve mounting groove 305 are co-circular, and the inner diameter of the first sleeve mounting groove 304 is larger than the inner diameter of the second sleeve mounting groove 305;
Correspondingly, the shaft sleeve 5 is in a T shape and comprises a sleeve 501 and an annular flange 502, wherein the sleeve 501 and the annular flange 502 are connected with each other, the rotating shaft 2 is movably sleeved on the sleeve 501, and the clamp spring 6 acts on the outer surface of the annular flange 502 to realize limiting.
As shown in fig. 4, in order to reduce friction between the rotating shaft 2 and the inner wall of the sleeve 501, in this embodiment, a plurality of annular grooves 503 are formed along the inner wall of the sleeve 501, and the annular grooves 503 are filled with grease, or may also be solid lubrication such as graphite.
As a mounting form between the boss 2 and the front end cap 1 in the present embodiment, the bottom surface of the annular flange 502 is bonded to the bottom wall of the first boss mounting groove 304 by an adhesive;
Wherein the binder is anaerobic adhesive, and the model is preferably LOCTITE 222;
Specifically, in this embodiment, a small gap with a tolerance of H8/f7 is left between the outer wall of the sleeve 501 and the inner wall of the sleeve mounting groove 302, so as to facilitate adhesion and installation;
The optimal environment temperature during bonding is 25+/-1 ℃, and the bonding time is 45-75 min, preferably 60min.
In addition, a plurality of disassembly holes 504 are further formed in the annular flange 502, and the number of the disassembly holes 504 is even, and the disassembly holes are arranged at equal intervals, so that the shaft sleeve 5 and the shaft sleeve mounting groove 302 are separated by screwing in and ejecting during disassembly.
When routine maintenance is carried out, the clamping spring 6 is only required to be taken down, the shaft sleeve 5 is heated (the dismounting temperature is about 150 ℃), the shaft sleeve 5 is taken down and then placed in a cleaning agent for 30min, the cleaning agent is taken out and wiped clean, after the surface is dried, the adhesive is coated again and bonded with the front end cover body, and maintenance can be completed without replacing a new shaft sleeve 5.
When the rotary joint surface is worn, maintenance can be completed by replacing only one shaft sleeve 5.
In this embodiment, the sleeve 5 is made of lead brass, preferably HPb63-0.1 lead brass.
The front end cover 1 is made of metal, and cast iron, ordinary carbon steel, alloy steel, cast steel and the like can be selected.
As shown in fig. 5, as an optimization of the rotating shaft 2 in the present embodiment, the rotating shaft 2 includes, in order from outside to inside, a rotating shaft extending section 201, the rotating shaft supporting section 202, and a rotating shaft rear section 203;
Wherein the shaft extending section 201 is located at the outer side of the front end cover 1, the shaft rear section 203 is located at the inner side of the front end cover 1, and the shaft supporting section 202 is located in the through groove 3;
Specifically, the shaft extending section 201, the shaft supporting section 202 and the shaft rear section 203 are all cylindrical with the same axis, and the outer diameter of the shaft extending section 201 is smaller than the outer diameter of the shaft supporting section 202 is smaller than the outer diameter of the shaft rear section 203.
As shown in fig. 7 and 8, in order to facilitate the sealing assembly between the front end cover and the explosion-proof motor body, an annular sealing protrusion 7 concentric with the through groove 3 is further arranged along the inner side of the front end cover 1 in the embodiment, and the annular sealing protrusion 7 is matched with the stator cavity of the explosion-proof motor;
Screw holes 8 are formed in the corners of the front end cover 1 and are used for screwing the front end cover and the ports of the stator cavity through screws.
The above description is for the purpose of illustrating the embodiments of the present utility model and is not to be construed as limiting the utility model, but is intended to cover all modifications, equivalents, improvements and alternatives falling within the spirit and principle of the utility model.
Claims (10)
1. The front end cover assembly for the explosion-proof motor comprises a front end cover (1) and a rotating shaft (2), and is characterized in that a through groove (3) for the rotating shaft (2) to penetrate is formed in the axis position of the front end cover (1), and the through groove (3) comprises a bearing mounting groove (301), a shaft sleeve mounting groove (302) and a snap ring groove (303) from inside to outside; a ball bearing (4) is arranged in the bearing mounting groove (301), a shaft sleeve (5) is arranged in the shaft sleeve mounting groove (302), a clamp spring (6) is embedded in the clamp spring ring groove (303), and the clamp spring (6) limits the outer end face of the shaft sleeve (5); the rotating shaft (2) comprises a rotating shaft supporting section (202), and the rotating shaft supporting section (202) is sleeved with the inner ring of the ball bearing (4) and is movably sleeved with the shaft sleeve (5).
2. The front end cover assembly for an explosion-proof motor according to claim 1, wherein the bearing mounting groove (301), the sleeve mounting groove (302) and the snap ring groove (303) are all circular, and the inner diameter of the bearing mounting groove (301) is set to R1, the inner diameter of the sleeve mounting groove (302) is set to R2, and the inner diameter of the snap ring groove (303) is set to R3, then:
R1＞R2，R3＞R2。
3. The front end cover assembly for an explosion-proof motor according to claim 1, wherein the sleeve mounting groove (302) is T-shaped, and comprises a first sleeve mounting groove (304) and a second sleeve mounting groove (305) which are communicated with each other; correspondingly, the shaft sleeve (5) is T-shaped and comprises a sleeve (501) and an annular flange (502) which are connected with each other, wherein the annular flange (502) is arranged at the outer end of the sleeve (501), and the rotating shaft (2) is movably sleeved on the sleeve (501).
4. A front end cap assembly for an explosion-proof motor according to claim 3, characterized in that a number of annular grooves (503) are provided along the inner wall of the sleeve (501), the annular grooves (503) being filled with grease.
5. A front end cap assembly for an explosion-proof electric machine according to claim 3, wherein the bottom surface of the annular flange (502) is bonded to the bottom wall of the first sleeve mounting groove (304) by an adhesive.
6. A front end cover assembly for an explosion-proof electric machine according to claim 3, characterized in that a number of dismounting holes (504) are also provided in the annular flange (502).
7. Front end cover assembly for an explosion-proof electric machine according to claim 1, characterized in that the bushing (5) is of lead brass material.
8. The front end cover assembly for the explosion-proof motor according to claim 1, wherein the front end cover (1) is made of metal.
9. The front end cover assembly for the explosion-proof motor according to claim 1, wherein the rotating shaft (2) sequentially comprises a rotating shaft extending section (201), a rotating shaft supporting section (202) and a rotating shaft rear section (203) from outside to inside, the rotating shaft extending section (201) is located on the outer side of the front end cover (1), the rotating shaft rear section (203) is located on the inner side of the front end cover (1), and the rotating shaft supporting section (202) is located in the through groove (3).
10. The front end cover assembly for the explosion-proof motor according to claim 1, wherein an annular sealing protrusion (7) concentric with the through groove (3) is further arranged along the inner side of the front end cover (1), and the annular sealing protrusion (7) is matched with a stator cavity of the explosion-proof motor; screw holes (8) are formed in the corners of the front end cover (1) and are used for screwing the front end cover and the ports of the stator cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322589858.3U CN220985424U (en) | 2023-09-23 | 2023-09-23 | Front end cover assembly for explosion-proof motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322589858.3U CN220985424U (en) | 2023-09-23 | 2023-09-23 | Front end cover assembly for explosion-proof motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220985424U true CN220985424U (en) | 2024-05-17 |
Family
ID=91040848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322589858.3U Active CN220985424U (en) | 2023-09-23 | 2023-09-23 | Front end cover assembly for explosion-proof motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220985424U (en) |
-
2023
- 2023-09-23 CN CN202322589858.3U patent/CN220985424U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |